Physics
posted by Anonymous .
A delivery truck travels 21 blocks north, 17 blocks east, and 27 blocks south.
What is its final displacement from the origin (direction)?

went 21  27 = 6 blocks north
went 17 east
magnitude = sqrt (17^2 + 6^2)
tangent of angle south of east = 6/17
angle clockwise from north (compass bearing from origin) = 90 + tan^1(6/17)